Catching up:

Periscope users will be glad to know that they are finally able to fast-forward and rewind replays of broadcasts, a feature that has long been requested by users. The feature is available to both Android and desktop, and will roll out to iOS in the near future.

As noted by Tech Times: "Users will find the new feature particularly helpful given the fact that most broadcasts aren't that exciting for the first 15 to 20 seconds, with the broadcaster waiting for users to join in the broadcast."

According to Mary Meeker's 2015 Internet Trends report, vertical viewing has increased fivefold, from a mere 5% in 2010 to 29% in 2015. As media consumption continues to shift from traditional desktop screens to mobile, marketers must consider how vertical content will fit into their digital marketing strategy, especially when appealing to millennials on Snapchat and Periscope.

Amid all the worries about ( Twitter's NYSE:TWTR) user growth problem, and following the company's worse-than-expected guidance for its important fourth quarter, one key topic discussed by management during the company's most recent earnings call has been mostly overlooked: Vine and Periscope.